CLASS 7 · SCIENCE · CHAPTER 6

Adolescence: A Stage of Growth and Change

Simple answers to all 10 end questions, chapter activities, health prompts, and three exploratory projects.

23 worked answersComplete chapter answers

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23 worked answers · short steps first, explanations when you need them

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Textbook pages 85–87

Question 1

Ramesh, an 11-year-old boy, has developed a few pimples. (i) What could cause them? (ii) What can he do for relief?

Steps only

Adolescent skin may become oilier; gentle washing and not squeezing can help.

Answer

More skin oil can block pores. Wash gently and seek adult or medical advice if needed.

Question 2

Which of the two food groups shown in the textbook would be a better option for adolescents, and why?

Steps only

Option (ii) is a balanced meal with a wider variety of nutritious foods.

Answer

Choose option (ii), the balanced meal. It supports growth with a variety of nutrients.

Question 3

Unscramble: (i) nstmnoiaretu, (ii) iceov xob, (iii) urtypeb, (iv) lahoclo and srugd.

Steps only

Unscramble each word using the chapter clues.

Answer

Menstruation; voice box; puberty; alcohol and drugs.

Question 4

Shalu says adolescence brings only physical changes. Is she correct? Improve her description.

Steps only

Adolescence includes physical, biological, emotional, and behavioural changes.

Answer

No. It involves more than physical growth, and everyone changes at their own pace.

Question 5

What questions would you ask to check these claims? (i) Adolescents need not worry about behavioural changes. (ii) Anyone who tries a harmful substance once can stop whenever they want.

Steps only

Ask for evidence about behaviour, addiction, health effects, and sources of help.

Answer

Behaviour matters, and harmful substances can be addictive; evidence helps check both claims.

Question 6

Besides mood swings, what behavioural changes may happen during adolescence?

Steps only

Sensitivity, new interests, independence, and stronger feelings may increase.

Answer

Behaviour changes vary; talking with a trusted adult can help.

Question 7

What menstrual hygiene and sanitary habits would you suggest to your friends?

Steps only

Use and change a clean product, wash hands, and dispose of it safely.

Answer

Menstruation is natural; good hygiene and asking for help when needed matter.

Question 8

Mary and Manoj each notice a bulge at the front of the neck. Mary is advised to eat iodine-rich food and take medicine; Manoj is told his bump is part of growing up. Why might the advice differ?

Steps only

Mary may have thyroid swelling; Manoj may have a normally growing voice box.

Answer

The causes differ, so a doctor checks and gives suitable advice.

Question 9

Sort these changes as observed only in boys, only in girls, or in both: voice change, breast development, moustache growth, facial hair, pimples, pubic hair, and armpit hair.

Steps only

Boys: moustache/facial hair. Girls: breast development. Both: voice changes, pimples, pubic and armpit hair.

Answer

These are common patterns; individual changes vary.

Question 10

Prepare a poster with tips for adolescents to live a healthy lifestyle.

Steps only

Give short tips about food, hygiene, activity, rest, support, online safety, and avoiding harmful substances.

Answer

A healthy lifestyle supports body and mind.

Activities and projects

Textbook pages 74–88

Question Activity 6.1

Give sample entries for a class table about changes in height, weight, strength, and appearance while growing up.

Steps only

Height, weight, strength, and appearance can change; people grow at different rates.

Answer

Answers vary. Keep observations respectful and anonymous.

Question Activity 6.2

Give sample entries showing how emotions may affect behaviour and how a young person can respond positively.

Steps only

Mood swings, sensitivity, and strong emotions may occur; activities and trusted support can help.

Answer

People experience emotions differently; healthy activities can help.

Question Activity 6.3

Give sample local food sources, the nutrients they provide, and how those nutrients help growth.

Steps only

Calcium supports bones; protein supports growth and repair; iron helps make haemoglobin.

Answer

A varied diet provides nutrients for growth and health.

Question Sections 6.1–6.2

What is adolescence, and how is puberty related to it?

Steps only

Adolescence is the broader growing-up period; puberty is the stage of body changes within it.

Answer

Puberty is one part of adolescence.

Question Science and Society

What health problem can low iron cause, how can iron deficiency be managed, and what support programmes are available?

Steps only

Iron-rich foods can help; a health worker should check symptoms and guide treatment. Anemia Mukt Bharat and RKSK are government programmes.

Answer

Eat varied iron-rich foods and seek adult or health-worker advice.

Question Know a Scientist

Name some foods that provide vitamin B12.

Steps only

Milk, dairy foods, eggs, fish, meat, and some fortified foods can provide vitamin B12.

Answer

Choose suitable B12 sources; fortified foods list B12 on the label.

Question Section 6.4.3

Give examples of physical activities and explain how they can help adolescents.

Steps only

Walking, sports, dance, cycling, and yoga are ways to stay active.

Answer

Regular activity supports fitness, stamina, and mood.

Question Section 6.5

Why do many changes happen during adolescence?

Steps only

Hormones, released in response to body signals, guide growth and other changes.

Answer

Hormones help control changes during adolescence.

Question Section 6.4.5

What can an adolescent do if someone pressures them to try tobacco, alcohol, or drugs?

Steps only

Say no, move away, and ask a trusted adult for help.

Answer

Do not try them; get help from a trusted adult.

Question Exploratory Project 1

How can students learn about local people or organisations that support young people’s mental health? Prepare five respectful interview questions.

Steps only

Interview a counsellor or recognised group with adult guidance; ask five general questions and protect privacy.

Answer

Ask about services, access, privacy, and where to find help.

Question Exploratory Project 2

Write a short, respectful role-play showing how child marriage can affect a child and how a trusted adult can help.

Steps only

Show a child seeking help from a trusted adult and explain how child marriage can harm well-being.

Answer

Focus on safety, education, health, and supportive help.

Question Exploratory Project 3

Suggest a simple, safe plan for a school Yoga Day activity.

Steps only

Have a trained adult lead gentle poses; let students rest or stop whenever needed.

Answer

Keep the Yoga Day activity gentle, guided, and optional.

Let Us Enhance Our Learning

Ramesh, an 11-year-old boy, has developed a few pimples. (i) What could cause them? (ii) What can he do for relief?

Answer

Which of the two food groups shown in the textbook would be a better option for adolescents, and why?

Answer

Unscramble: (i) nstmnoiaretu, (ii) iceov xob, (iii) urtypeb, (iv) lahoclo and srugd.

Answer

Shalu says adolescence brings only physical changes. Is she correct? Improve her description.

Answer

What questions would you ask to check these claims? (i) Adolescents need not worry about behavioural changes. (ii) Anyone who tries a harmful substance once can stop whenever they want.

Answer

Besides mood swings, what behavioural changes may happen during adolescence?

Answer

What menstrual hygiene and sanitary habits would you suggest to your friends?

Answer

Mary and Manoj each notice a bulge at the front of the neck. Mary is advised to eat iodine-rich food and take medicine; Manoj is told his bump is part of growing up. Why might the advice differ?

Answer

Sort these changes as observed only in boys, only in girls, or in both: voice change, breast development, moustache growth, facial hair, pimples, pubic hair, and armpit hair.

Answer

Prepare a poster with tips for adolescents to live a healthy lifestyle.

Answer

Activities and projects

Give sample entries for a class table about changes in height, weight, strength, and appearance while growing up.

Answer

Give sample entries showing how emotions may affect behaviour and how a young person can respond positively.

Answer

Give sample local food sources, the nutrients they provide, and how those nutrients help growth.

Answer

Give examples of safe social-media dos and don’ts for a school awareness poster.

Answer

What is adolescence, and how is puberty related to it?

Answer

What health problem can low iron cause, how can iron deficiency be managed, and what support programmes are available?

Answer

Name some foods that provide vitamin B12.

Answer

Give examples of physical activities and explain how they can help adolescents.

Answer

Why do many changes happen during adolescence?

Answer

What can an adolescent do if someone pressures them to try tobacco, alcohol, or drugs?

Answer

How can students learn about local people or organisations that support young people’s mental health? Prepare five respectful interview questions.

Answer

Write a short, respectful role-play showing how child marriage can affect a child and how a trusted adult can help.

Answer

Suggest a simple, safe plan for a school Yoga Day activity.

Answer